Tool to create perfect circles that also functions as a ruler, millimeter and inches. Curved end has degree marks every 10 deg. The tolerances are somewhat tight and it will need a well tuned printer. I'm not much of a artist myself so I welcome any suggestions to improve or add to the functionality.Print out Compass all.STL, other files are replacement parts. Printed at .2 layer height. To help with small features this was printed with a extrusion width of .3 on a .4 nozzle. PLA on a makerbot rep2